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Finding the Fourth Proportional to 39,692.40, 54,776.08 and 21,787.08

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Solution

The fourth proportional to 39,692.40, 54,776.08 and 21,787.08 is: 30,066.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,692.40 : 54,776.08 = 21,787.08 : x
  2. Step 2: Convert to fraction form
    39,692.40/54,776.08 = 21,787.08/x
  3. Step 3: Cross multiply
    39,692.40x = 54,776.08 × 21,787.08
  4. Step 4: Simplify right side
    39,692.40x = 1,193,410,837.05
  5. Step 5: Solve for x
    x = 1,193,410,837.05/39,692.40
  6. Step 6: Final answer
    x = 30,066.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.